Répondre :
276/252
=(23*12)/(21*12)
=23/21
105/30
=(15*7)/(15*2)
=7/2
108/62
=(2*54)/(2*31)
=54/31
=(23*12)/(21*12)
=23/21
105/30
=(15*7)/(15*2)
=7/2
108/62
=(2*54)/(2*31)
=54/31